Sentence examples for gas draining from inspiring English sources
Surface drilling was performed at the Luling Coal Mine, in Huaibei, to shorten the period required for gas draining.
The factors affecting pressure relief gas draining by surface drilling were analysed.
The gas draining occurred in three stages: a growth period; a period of maximum gas production; and an attenuation period.
Results from the trial showed that gas drained from the surface system over a period of 10 months.
The quantity of pressure-relieved gas drained can therefore be increased by increasing the borehole resistance.
The volume of gas drained was mainly influenced by the condition of the well and geological structure.
There is no effective method of increasing the quantity of pressure-relieved gas drained from the protected layer.
If the well collapsed or water accumulated in the bore, the quantity of gas drained would drop quickly.
This demonstrates that the quantity of pressure-relieved gas drained is related to the total flow of gas, its concentration, and the negative gas drainage pressure.
The results show that the quantity of pressure-relieved gas drained from the protected layer can be significantly increased by increasing the flow resistance of the borehole bottom.
A method of increasing the resistance of the borehole bottom is proposed, which can increase the quantity of pressure-relieved gas drained from the protected layer.
